<template>
  <div>
    <table
      border="1"
      width="700"
      style="border-collapse: collapse"
    >
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th>
            <input type="checkbox" v-model="isAll"/> <span>全选</span>
          </th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>
      <tbody>
        <!-- <tr is="CartTr" v-for="(good) in goodList" 
        :key="good.name"
        :goods="good"
        @deleteTr="removeTr"></tr>  -->
        <cart-tr v-for="(good, index) in goodList" 
        :key="good.name"
        :goods="good"
        @deleteTr="removeTr(index)"
        ></cart-tr>
      </tbody>
      <tfoot>
        <tr>
          <td>合计:</td>
          <td colspan="5">
            {{totalMoney}}
          </td>
        </tr>
      </tfoot>
    </table>
  </div>
</template>

<script>
import CartTr from './CartTr.vue'
export default {
  name: 'ShoppingCart',
  components: {
    CartTr
  },
  data() {
    return {
      goodList: [
        {
          name: "诸葛亮",
          price: 1000,
          num: 1,
          checked: false,
        },
        {
          name: "蔡文姬",
          price: 1500,
          num: 1,
          checked: false,
        },
        {
          name: "妲己",
          price: 2000,
          num: 1,
          checked: false,
        },
        {
          name: "鲁班",
          price: 2200,
          num: 1,
          checked: false,
        },
      ],
    };
  },
  methods: {
    removeTr(index){
      this.goodList.splice(index, 1);
    }
  },
  computed: {
    isAll: {
      set(val){
        this.goodList.map(item => item.checked = val)
      },
      get(){
        return this.goodList.every(item => item.checked)
      }
    },
    totalMoney(){
      return this.goodList.filter(item => item.checked).reduce((t, n) => t + n.num * n.price, 0)
    }
  }
}
</script>

<style>

</style>